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<p>This study documents the first confirmed epizootic outbreak of <i>Entomophthora grylli</i> (Entomophthoromycota: Entomophthorales) infecting <i>Diabolocatantops pinguis</i> (Stål) (Orthoptera: Acrididae) in southern India, during the mid-November to December 2024 at Sri Mekapati Gowtham Reddy Agricultural College, Udayagiri, Andhra Pradesh, India. A rapid roving survey documented summit disease symptoms in <i>D. pinguis</i> and assessed environmental influences on infection dynamics. To quantify the material examined, a total of 3345 individuals (1038 infested cadavers and 2307 healthy individuals) were sampled across five sites. A strong negative correlation was observed between maximum temperature and infection (<i>r</i> = −0.75, <i>P</i> ≤ 0.05), with positive correlations for rainfall (<i>r</i> = 0.66,<i> P</i> ≤ 0.05) and morning relative humidity (<i>r</i> = 0.38, <i>P</i> &gt; 0.05). These findings highlight the climatic dependence of <i>E. grylli</i> epizootics and suggested its potential as a natural biocontrol agent in semi-arid agroecosystems. This research provides a critical baseline for future studies on fungal strain diversity and weather-based predictive modelling for pest management.</p>

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First Report of Entomophthora grylli Epizootics on the Short-Horned Grasshopper, Diabolocatantops pinguis (Stål), from Southern India

  • 期刊论文

  • 发表日期：

    2026年4月9日

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  • Giri Naga Harish,
  • M. Kishan Tej,
  • S. Suresh Rao,
  • G. Krishna Reddy,
  • Cherukuri Sreenivasa Rao,
  • M. C. Keerthi

摘要

This study documents the first confirmed epizootic outbreak of Entomophthora grylli (Entomophthoromycota: Entomophthorales) infecting Diabolocatantops pinguis (Stål) (Orthoptera: Acrididae) in southern India, during the mid-November to December 2024 at Sri Mekapati Gowtham Reddy Agricultural College, Udayagiri, Andhra Pradesh, India. A rapid roving survey documented summit disease symptoms in D. pinguis and assessed environmental influences on infection dynamics. To quantify the material examined, a total of 3345 individuals (1038 infested cadavers and 2307 healthy individuals) were sampled across five sites. A strong negative correlation was observed between maximum temperature and infection (r = −0.75, P ≤ 0.05), with positive correlations for rainfall (r = 0.66, P ≤ 0.05) and morning relative humidity (r = 0.38, P > 0.05). These findings highlight the climatic dependence of E. grylli epizootics and suggested its potential as a natural biocontrol agent in semi-arid agroecosystems. This research provides a critical baseline for future studies on fungal strain diversity and weather-based predictive modelling for pest management.